Pantograph engraving machine



(No Model.) h 4 Sheet'sSheet 1. I J. HOPE;

PANTOGRAPH ENGRAVING MACHINE.

Patented July 17, 1883 ZNVENTU #040 WET/E5555 ETERS Photo-Lithographer.Wasffinglm.

(No Model.) 4 Sheets-Sheet 2.

. J. HOPE. I

PANTOGRAPH ENGRAVING MACHINE. No. 281,510. Patented July 17, 1883...

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(No Model.) 4 Sheets-Sheet 4. J. HOPE. PANTOGRAPH ENG'RAVING MACHINE.

No. 281,510. Patented July "17, 1883.

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UNITED STATES PATENT OFFICE.

JOHN HOPE, or PROVIDENCE, RHODE ISLAND.

PA NT OGRAPH ENG RAVING-MACHINE.

SPECIFICATION forming part of Letters Ifatent No. 281,510, dated July17, 1883.

Application filed October 9, 1882. (N model.)

1o fication.

This invention has reference to an improvement in machines for engravingthe rolls for calico-printers, and similar rolls used for print- Theinvention consists in the peculiar construction of the machine by whicha large variety of figures and designs can be engraved by mechanicalmeans, as will be more fully set forth hereinafter.

Pantograph engraving-machines have heretofore been used to engrave therolls for calico and other printers by tracing with a stylus over alarge pattern, and reproducing the "same pattern on a smaller scale manytimes, as a 2 number of diamond-pointed gravers were operated by thestylus. In my improved pantograph engraving-machine I employ a gearedmechanism, similar to the rose-engine, pro- 'vided with holes, intowhich the stylus is entered, so that it follows every motion of themachine, and these motions are reproduced by each one of the gravers.

Figure 1 is a view showing the improved pantograph engraving-machine incross-sec tion. Fig. 2 represents one of the figures through which thestylus moves at each revolution of the rose-engine mechanism. Fig. 3 isa view of the completed figure. Fig. 4 is an end view of the rose-enginemechanism,

showing the hand-wheel by which the same is operated. Fig. 5 is a topview of the machine.

Fig. 6 is a top view of the geared disk, the reciprocating plate beingremoved. Fig. 7 is a sectional view through the center, showing 4 5 theweight by which the reciprocating plate is guided around the centralpattern. Fig. 8 is .a,section of sleeve m. Fig. 9 is an enlargedsectional view of the adjustable crank by which the reciprocating plateis operated. Fig.

1C is a sectional view of the adjustable crank,

showing the screw engaging with the stud on which the crank-pin issecured. Fig. 11 is an enlarged View, showing the means for adjustingthe reciprocation of the stylus with reference to the size of the figureproduced. Fig. 12 is a view of the locking device for holding thepinion. Fig. 13 is a view of the slotted eccentric used for the finaladjustment of the reciprocating plate.

In the drawings, A is the stylus, hinged to the tracer-arm of thepantograph engravingmachine, which machine is of the usual constructionused by me in such machinesthat is to'say, B is thetracer-arm, securedto the carriage G, which is mounted on ways secured to the carriage D,also mounted on ways. The carriage 0, through the arm E, imparts lateralmotion, and the carriage D rotary motion, to

the roll F, and so transmits every motion of the stylus to the roll; orit may be made to transmit such motion to the gravers.

As this invention refers to the application of the geared mechanism toany of the pantograph engraving-machines as now constructed, a moreparticular description of such machines is deemed unnecessary.

Fig. 1 shows the connection of the mechanism with the stylus of one kindof pantograph engraving-machines.

Referring to Fig. 5, G is a reciprocating plate provided with a slide,in which a row of holes, 9 g, are made, and into any one of which holesthe stylus A of the pantograph engraving-machine may be placed, andevery motion of the same transmitted'to either the roll or the gravers,so asto be produced manifold on the roll.

The construction of the machine is as follows:

On the bed-plate H, provided with two rails, h h, the central tubularpost, I, is, firmly secured, and on top of this post the pattern 2',representing the outline of the desired figure, is secured, so as toform a guide or bearing for the roller in the bracket i, which. is partof the machine proper.

t is a cord or chain passing over a pulley down through the center ofthe post I. It is secured to the bracket 1', and has aweight suspendedfrom the other end. This weight keeps the machine proper at all times incontact with the pattern 1, and thus gives to the figure produced thegeneral outline of the pattern, which may be of any form desired. Toallow the geared mechanism to freely adjust itself to the centralpattern in all directions, the

same is mounted on two carriages or slides.

K is one of these carriages, supported on the ways 71 h, on which it maybe arranged to slide; or it may be supported on wheels in the samemanner as the carriages of the pantographmachine shown in Fig. 1.

k is are rails or ways placed on the carriage K, at right angles to theways h h on the base plate H. On these ways is k the carriage L is madeto slide, or, if provided with wheels, to roll.

M is a circular disk turning 011 the toothed rim N, which is secured tothe carriage L. 'The disk M is rotated by the sleeve m, which has twoflattened sides, as is shown in Fig. 8, and which enters a slot in thedisk M, as is shown in Fig. 6, partly in solid and partly in brokenlines. The sleeve on forms part of the wormgear 122/, and is rotated bymeans of the worm m, turned by the crank m. It will therefore be seenthat by turning the crank m" the worm m turns the worm-gear m and thesleeve m,- that this sleeve turns the disk M, and with it anythingmounted on the said disk; that the disk M, being mounted on the twocarriages L and K, each moving on ways at right angles to the other, canfreely move on the driving-sleeve m and adjust itself to the pattern i,against the edge of which it is held by means of the weight 1', and thattherefore in its rotation the disk M will follow the outline of thepattern 6. The plate G is mounted on the disk M and held by the'posts g,which enter slots formed in the lateral projections or arms of the plateG, and form guides in which the plate reciprocates. The reciprocatingmotion is produced by means of the pinion O which gears into thestationary toothed disk N. The pinion O is journaled in the bracket 0,which is secured to the disk M, and is connected with the reciprocatingplate G, forming the third bearing on which the plate G slides, thescrew 0 passing through a slot in said plate G. Connected with the shaft0 of the pinion O is the crank O in which the block 0, provided with azero-mark, slides, controlled by an adj usting-screw, so that the throwof the crank can be accurately adj usted, and such adjustmentascertained by reference to the position of the zero-mark on the block0, in connection with the divisions marked on the crank 0 as is clearlyshown in Figs. 9 and 10. The pin 0 enters the block 0", whichissecuredin the plate Gby the screw 0, and can also be adjusted withreference toa scale marked on the plate G. P is a slide provided withthe the holes 9 g, on one end of which a square projection, p, isformed, in which the eccentric p is secured, so that by the turning ofthe eccentric, a very nice adjustment can be secured. Fig. 11 showsthese means for adjustment very clearly on a large scales.

The operation of this mechanism is as follows: Considering that theprevious description clearly sets forth the means for rotating the diskM and all connected with the same with reference to the pattern 1 andhow the disk will adjust itself to the said pattern, it will be seenthat the pinion 0 will be rotated around its own axis and around thetoothed rim N by being geared with the same, and that the crank 0 willreciprocate the plate G and slide P in and out at each revolution of thepinion O, and that at each revolution of the disk M a complete figure isproduced. The size of the figure produced depends on the size of thepattern i, the length of the throw of the crank 0 and the hole 9 intowhich the stylus is placed. A great variety of work can be produced bythis machine and multiplied by the pantograph engraving-machine. In thedrawings, a pinion, O, of one-eighth the diameter of the toothed rim Nis shown; but the pattern 6 is six-sided. Now, the figure produced isshown in Fig. 3, and differs materially from a figure produced by thesame gear with an eight-sided pattern, while, with the same gear and thesame pattern, the moving of the stylus one hole farther out or in willdescribe a series of lines in the first pattern that will produce aneweffect; and if, by means of the eccentric p, the slide Pis slightlychanged a very fine effect of shading is produced, as the difference ismost apparent on the outer loop, and the lines merge on the inward andoutward lines. A large variety of other changes can be made by theinterchange of larger or smaller pinions, for the pinion 0 changes inthe throw of the crank O, or the point at which the block 0 is secured,and

all can be transferred and multiplied by the' pantographengraving-machine.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination, with the pantograph engravingmachine, of the rose engine, a geared mechanism, substantially asdescribed, provided with a pattern-holder and adjustable slide havingholes 9 to receive the stylus, and automatic means for keeping saidslide in position to hold the stylus in contact with the pattern whilepermitting it to follow the con vided with the ways k k, and the disk M,provided with a central slot, of the post I, the pattern 1', the weight1', the sleeve m, provided with the Worm-gear m, and the worm m constructed to rotate the reciprocating parts demeans for rotating the samearound a fixed pattern, of the pinion O, geared into the fixed toothedrim N, the adjustable crank 0 and the plate G, provided with the slideP, having the holes 9 g, of the stylus A of apantographengraving-machine constructed to produce geometrical figures, asdescribed.

5. In a geared mechanism for producing geometrical figures through apantograph engraving-machine, the combination, with the reciprocatingslide provided with holes for receiving the stylus andconnecting thepantograph engraving machine, of the adjusting devices consisting of theeccentric p, the block 0 and the scale for regulating the adjustment,and the block 0, adjusted by means of the screw in the crank 0 as andforthe purpose described.

6. The combination, with the disk M, constructed to rotate around afixed pattern and guided by the same, of the toothed rim N, the pinionO, the adjustable crank 0 and the re ciprocating plate G, provided Withholes to receive and operate the stylus of a pantographengravingrmachine, as described.

JOHN HOPE.

Witnesses:

HENRY J. MILLER, M. E. EMERsoN.

